<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script>
        //第二题
        // setTimeout(function () {
        //     console.log(1)
        // })
        // new Promise(function (resolve, reject) {
        //     console.log(2)
        //     resolve(3)
        // }).then(function (val) {
        //     console.log(val)
        // })
        // console.log(4)

        //第三题
        console.log(1)

        setTimeout(function () {
            console.log(2)
            new Promise(function (resolve) {
                console.log(3)
                resolve()
            }).then(function () {
                console.log(4)
            })
        })

        const p = new Promise((resolve, reject) => {
            console.log(5)
            resolve() // 标记为成功
            console.log(6)
        })

        p.then(data => {
            console.log(7)
        })

        console.log(8)
    </script>
</body>

</html>